Leadfoot
Jane Goodall of the N&P Forum
The only reason the 340 is the bad *** motor is because they didn't build a 360 during the horsepower era. If they did you wouldn't even be able to give a 340 away.
technically, your wrong, they built 360s in 71 which was probally the high mark of 340 performance. But they never intended the 360 to be the performance engine, although with compression, cam and headflow, the 360 is every bit as capable.The only reason the 340 is the bad *** motor is because they didn't build a 360 during the horsepower era. If they did you wouldn't even be able to give a 340 away.
If built similar, the 360 will flat out kick the 340 in the nads. This is assuming similar cam specs, compression..etc. The longer stroke provides more low end torque on the street which is what you want.
For one longer stroke doesn't make more torque displacement does a 0.40" 400 (408 ) RB and a 408 LA has the same torque producing ability because while the crank will multiply the cylinder pressure the RB has a bigger piston (more cylinder pressure) equaling out the the effect.
Secondly its also wrong that an equally build 340/360 that the 360 will kick the 340 or 318 for that matter in the nads because of torque, maybe cause of bad setup but not because of torque because a 400hp engine no matter if its a 2l 318 340 360 440 540 all can accomplish the same amout of work in the same amount of time thats the definition of horsepower= move 33000lb 1 foot in 1 minute. Or cars weight/quarter mile/E.T.
For one longer stroke doesn't make more torque displacement does a 0.40" 400 (408 ) RB and a 408 LA has the same torque producing ability because while the crank will multiply the cylinder pressure the RB has a bigger piston (more cylinder pressure) equaling out the the effect.
Secondly its also wrong that an equally build 340/360 that the 360 will kick the 340 or 318 for that matter in the nads because of torque, maybe cause of bad setup but not because of torque because a 400hp engine no matter if its a 2l 318 340 360 440 540 all can accomplish the same amout of work in the same amount of time thats the definition of horsepower= move 33000lb 1 foot in 1 minute. Or cars weight/quarter mile/E.T.
I passed advanced high school English with high Bs and As, but your post makes zero sense.
Gryzynx I was talking .40" on a 400 big block bore to make the B engine a 408 to be compatible to the 408 LA.
My friend, you are all over the place here!
A 400 B engine has a 4.34 bore and a 3.375 stroke. Mechanical advantage with this stroke would be .265. Given the same linear force of 1000 pounds this would produce 265 ft/lb. torque. This is bested by the 360 LA!
Boring/stroking and gearing were not in the OP's question, although they are an interesting topic. We would best get back on topic.
LOL.... All the physics... and when the 340 guy and 360 guy have it all figured out, the dude with the 318 beats them both... and Mr. 340 and Mr. 360 are left starring at each other.... HUH?????????.... but the law of physics....!!!! Here, let me help. Science, and the law of physics determined the bumble bee cannot fly because its wings are too small for its body. Oops, somebody forgot to tell the bumble bee he can't fly.... LOL
Well, see here, this speaks volumes.... and I appreciate your respect for 318's. But, in every thread I've ever read, there is a subject that I've never seen mention... and that is.... the consumption in the cylinder! Let me give a small tip: only about 85 % (on average) of what is brought into the cylinder is ACTUALLY burned. The 340 does about 15-20 % more cfm's at 5000 rpm's. Hmmmmmmmmmmm.?????......... So if a 340 is actually only consuming 84%, and a person can get the 318 to burn 98 %, given the fact that heads, cam, intake/carb and exhaust are equal, then the 318 does NOT need to "twist higher". You see, on the dyno, cfm's are measured, efficiency is NOT!!!!!! That's why gross horsepower went away and net came into play. Never mind, I should start a thread called "new light"..... and maybe I will..... hmmmmThe 318 is a very capable engine. You gotta gear it lower and twist it higher to get her there though...
True story..and torque is what moves things273, I've read your posts and I just wanna soft say you are mistaken.
I'm not going to go into a long winded explaintion.
Spend some time in dyno rooms and read up.
Longer stroke engine deliver more torque down low even if the displacement is the same.
I'm out of this thread. Have fun beating this dead horse yet again, one more time!